Expansion-joint.



(LD. VICFAHLAND. EXPANSION Jouw.

APPLICATION FILED APR. 25. |918. l 928:7631 D ldtented Dec. 24, 1918.

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OWEND. MCFARLAND, OF CHICAGO, ILLINOIS, ASSIGNOR TO GUYTON & CUMFER MANU- FACT'URING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

EXPANSIONTJ'OINT.

Specication of Letters Patent.

Patented Dec. 2t, 1918.

Application led April 26, 1918. Serial No. 230,890.

To all 'whom t may concern.'

a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Expansion-Joints, of which the following is a speciication.

My invention relates to improvements 1n expansion joints for double conduit systems.

In double conduit systems, especially in such in which fluids of different Dtemperatures and viscosity are to be conducted, it is necessary to provide expansion joints, at frequent intervals, to compensate for the relativeexpansion and contractionof the concentrically arranged pipes constituting the conduit.

In pipes in which a slow moving viscous material, such for example as asphaltum, or the like, is to be conveyed, it is advantageous to surround such pipes b v larger concentrically-arranged pipes, and introduce a relatively hot medium between the pipes, such for example, as steam, whereby to increase the temperature of the inner medium, to thereby render it more limpid, that it may be caused to flow with greater freedom through the inner pipe.

In the accompanying drawings, forming part hereof, ll have shown two kinds of eX- pansion joints, of the same type, but one is adapted to compensate for a larger variation in axial dimensions of the pipes, than the other. In both cases, however, the compensation is made in the outer pipe line for mechanical reasons and because the parts are then more accessible for adjustment and re-V on line inner sections of pipe 5 and outer sections 6.

The inner vconduit is for conducting the slow movmg, viscous material and the outer conduit, between the two pipes, is intended to convey steam for the purpose of heating the relatively viscous materials to thereby raise its temperature and enhance its movement. The conduitl sections are connected together' by a single flange 7, with a single series of bolts 8. The larger expansion joint 10, which permits of very considerable relative axial movement of the outer pipe system with respect to the inner pipe system, consists of a member 11 having double concentric walls 12 and 13. These walls are integral parts of the flange 14, and provide a stem space 15 therebetween. And projecting radially from this extension is a flange 19 in which the stud bolts 8 are secured. A gland 2O is movable axially and is held in place by the nuts 21, that surround the stud bolts 8. The inner end of the cylindrical portion 22 of the gland, bears upon the packing 18 to make a perfectljv tight joint between the member 11 and another similar telescopically-associated member 23. rlhe member 23 is provided with inner walls 25 and an outer concentric wall 2l, having a steam face 26 therebetween. r1`he inner diametei` of the wall 25 is substantially the same as the inner diameter of the pipe 5 so as 'to provide an uninterrupted conduit 27 therein. The conduit 28 is annular in form, and is contained between the pipes 5 and 6, and is continued through the steam spaces 15 and 26 that the members 11 and 23 provide. Communication between the conduit 28 and the space 15 is through the ange coupling 7, and between the steam space 26 and the steam space 28.

The conduit members 11 and 23 are telescopically arranged so that they may be moved axially with respect to each other.

The steam spaces 15 and 26 may be connected together by any well known means. In this particular instance I have found 'a pipe 30 made more or less flexible., as by a coil 31, satisfactorily serves the. purpose.

It will be observed that everyv part of the conduit 5 is surrounded by a steam space and that the steam spaces 15 and 26 extend between the terminals of the pipe 30. Instead of using a pipe 30, a hose or other means may be employed, so as to 'provide a means for the steam to pass from the steam space .15 in one member of the expansion joint to the steam space 26 in the other member with out interfering with the relative' movement of the joint members.

rlhe bolts 8 extend from the flange 20 and ass through the flanges 7 and 14, on the eft of Fig. l, and serve as guides. The nuts 32 and 33, on the outer ends of the bolts, serve as stops to limit the axial movement of the expansion joint members 11 and 26.

There is supposed to -be a plural number of suchl expansion joints in a given line of pipe and whenl a given joint is expanded to the extreme extent permissible by the nuts 32 and 33, further expansion in the system will be taken up by another joint, rthat has not reached the limit of its movement.

An expansion `ioint 35, capable of less axial movement, consists of a cylindrical extension 36 having a flange 37 in the gland 38, between which cylinder and the gland is a suitable packing ring 39. A stud l0 projects from the flange 37 and passes through the flange 41 of the gland 38 and serves as a means for compressing the packing, supplied by the ring 39.

While I have herein shown asingle emi bodiment of my invention, for the purpose of clear disclosure, it is manifest that changes may b e made in the general arrangement and confi uration of the parts within the sco c of tie appended claims.

aving described my invention` what I claim is l. In a double conduit system, an expansion joint providing two telescopically-engaging double-wall concentrically parallel sections axially movable with respect to each other to compensate for variation in length of said conduits due to heat.

2. In a double conduit system, an expansion joint comprisin two telescopically-engaging axially mova le double-wall concentric, parallel sections; means for connecting the spaces between the respective walls tol gether and a packing ring between the sections.

3. In a double wall conduit system, an expansion joint comprising two telescopicallyengaging axially movable double-wall sections; a flexible conduit connecting the space .between said Walls together and a packing lbeyond the center for connection with the space between said pipes; an expansion joint providing two telescopically-engaging double-wall sections larger in diameter than the connected conduits, each section provided with a. flange, of the character described; a flexible means for connecting the spaces between said double walls of said expansion joint together, in combination with double pipe conduit sections having similar flanges for connection t0 the flanges ol' sa id joints.

In testimony whereof I hereunto set my hand.

OWEN D. MCFARLAND. 

